Yeah! Who doesn't like to be systematically given advantages over other players? You get a sniper, arguably the most efficient weapon in the game. You get to kill people without them even knowing where you are. You get a chainsaw, which is just annoying to go up against... You get to change the color of your vehicle, which really isn't that big of a deal, but it's a nice feature to have.
So, yeah, go for it. Buy it and you'll automatically (somehow) be better than everyone who hasn't paid.